60 lines
1.3 KiB
C
60 lines
1.3 KiB
C
/*
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* Copyright (c) 2000-2001, 2005 Sendmail, Inc. and its suppliers.
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* All rights reserved.
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*
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* By using this file, you agree to the terms and conditions set
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* forth in the LICENSE file which can be found at the top level of
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* the sendmail distribution.
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*
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* $Id: sem.h,v 1.9 2005/02/17 22:08:58 ca Exp $
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*/
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#ifndef SM_SEM_H
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# define SM_SEM_H 1
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#include <sm/gen.h>
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/* key for semaphores */
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# define SM_SEM_KEY (41L)
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# define SM_SEM_NO_ID (-1)
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# define SM_NO_SEM(id) ((id) < 0)
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# if SM_CONF_SEM > 0
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# include <sys/types.h>
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# include <sys/ipc.h>
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# include <sys/sem.h>
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# if SM_CONF_SEM == 2
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union semun
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{
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int val;
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struct semid_ds *buf;
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ushort *array;
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};
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# endif /* SM_CONF_SEM == 2 */
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# ifndef SEM_A
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# define SEM_A 0200
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# endif /* SEM_A */
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# ifndef SEM_R
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# define SEM_R 0400
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# endif /* SEM_R */
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# define SM_NSEM 1
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extern int sm_sem_start __P((key_t, int, int, bool));
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extern int sm_sem_stop __P((int));
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extern int sm_sem_acq __P((int, int, int));
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extern int sm_sem_rel __P((int, int, int));
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extern int sm_sem_get __P((int, int));
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# else /* SM_CONF_SEM > 0 */
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# define sm_sem_start(key, nsem, semflg, owner) 0
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# define sm_sem_stop(semid) 0
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# define sm_sem_acq(semid, semnum, timeout) 0
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# define sm_sem_rel(semid, semnum, timeout) 0
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# define sm_sem_get(semid, semnum) 0
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# endif /* SM_CONF_SEM > 0 */
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#endif /* ! SM_SEM_H */
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